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set_at now take a long long for y instead of int #2962

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set_at now take a long long for y instead of int #2962

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set_at now take a long long for y instead of int
oddbookworm Jun 30, 2024
4691737
Skip new unit test if CI is running or the machine running doesn't ha…
oddbookworm Jun 30, 2024
398d8ab
Test now skips based on total memory
oddbookworm Jun 25, 2025
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10 changes: 7 additions & 3 deletions src_c/draw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1425,8 +1425,12 @@ clip_line(SDL_Surface *surf, SDL_Rect surf_clip_rect, int *x1, int *y1,
}

static int
set_at(SDL_Surface *surf, SDL_Rect surf_clip_rect, int x, int y, Uint32 color)
set_at(SDL_Surface *surf, SDL_Rect surf_clip_rect, int x, long long y,
Uint32 color)
{
// y should be long long so that y * surf->pitch doesn't overflow the int
// bounds in the case of very large surfaces and drawing on the edge of
// them
Uint8 *pixels = (Uint8 *)surf->pixels;

if (x < surf_clip_rect.x || x >= surf_clip_rect.x + surf_clip_rect.w ||
Expand Down Expand Up @@ -1459,7 +1463,7 @@ static void
set_and_check_rect(SDL_Surface *surf, SDL_Rect surf_clip_rect, int x, int y,
Uint32 color, int *drawn_area)
{
if (set_at(surf, surf_clip_rect, x, y, color)) {
if (set_at(surf, surf_clip_rect, x, (long long)y, color)) {
add_pixel_to_drawn_list(x, y, drawn_area);
}
}
Expand Down Expand Up @@ -1788,7 +1792,7 @@ drawhorzlineclip(SDL_Surface *surf, SDL_Rect surf_clip_rect, Uint32 color,
}

if (x1 == x2) {
set_at(surf, surf_clip_rect, x1, y1, color);
set_at(surf, surf_clip_rect, x1, (long long)y1, color);
return;
}
drawhorzline(surf, color, x1, y1, x2);
Expand Down
15 changes: 15 additions & 0 deletions test/draw_test.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import math
import os
import sys
import unittest
import warnings
Expand Down Expand Up @@ -1846,6 +1847,20 @@ def test_line_clipping_with_thickness(self):
"start={}, end={}".format(end_points[n], start_points[n]),
)

@unittest.skipIf(pygame.system.get_total_ram() < 4096, "Surface is too large")
def test_line_draw_large_surf_regression(self):
"""Regression test for https://github.com/pygame-community/pygame-ce/issues/2961"""
try:
surface = pygame.Surface((14457, 37200))
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I don't like the addition of this test. It makes the assumption that the host has enough memory.

A better solution would be a RAM check with pygame.system.get_total_ram, and then running this test if the RAM is above some threshold, but I'm not a fan of this either.

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I don't particularly like it either, but I felt it would be better to have some way to test that it hasn't regressed in the future. I couldn't think of any solution other than "make a gigantic surface" that CI won't have the memory for. I did try to make the surface as small as I could and still cause the segfault without the changes from this branch

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A follow-up of my message, yes I think it's not the method to follow to add the test.

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A surface of 14457x37200 pixels, at 4 bytes per pixel is about 2.15 gigs. To be safe, I can skip the test if the total memory is 4 gigs or less

except pygame.error:
self.skipTest(
"Surface too large to run this test in this environment, or too many background tasks"
)

point1 = [400, 37135]
point2 = [401, 37136]
pygame.draw.line(surface, (255, 255, 255), point1, point2, 1)


### Lines Testing #############################################################

Expand Down
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